Powershell FTP-Upload schlägt fehl

function Upload-File([string]$path,[string]$url,$username,$password){
    try{
        $request = [System.Net.FtpWebRequest]::Create($url)
        $request.Method = [System.Net.WebRequestMethods+FTP]::UploadFile
        $request.Credentials = New-Object System.Net.NetworkCredential($username,$password)
        [bytes[]] $bytes = [System.IO.File]::ReadAllBytes($path)
        [System.IO.Stream]$stream = $request.GetRequestStream();
        $stream.Write($bytes,0,$bytes.Length)
        $stream.Close(); $stream.Dispose()
        $response = [System.Net.FtpWebResponse]$request.GetResponse()
        $result = $response.StatusDescription
        $response.Close()
        return $result
    }catch{
        throw $_.Exception.Message
        return $false
    }
}
function Download-File([string]$url,[string]$path,$username,$password){
    try{
        $request = [System.Net.FtpWebRequest]::Create($url)
        $request.Method = [System.Net.WebRequestMethods+FTP]::DownloadFile
        $request.Credentials = New-Object System.Net.NetworkCredential($username,$password)
        $response = [System.Net.FtpWebResponse]$request.GetResponse()
        [System.IO.Stream]$stream = $response.GetResponseStream()
        [System.IO.FileStream]$outstream = New-Object System.IO.FileStream ($path,[System.IO.FileMode]::Create)
        $stream.CopyTo($outstream)
        $outstream.Close();$stream.Close();$response.Close()
        $stream.Dispose();$outstream.Dispose();$response.Dispose()
        return $true
    }catch{
        throw $_.Exception.Message
    }
}

function List-FTPFiles([string]$url,$username,$password){
        $request = [System.Net.FtpWebRequest]::Create($url)
        $request.Method = [System.Net.WebRequestMethods+FTP]::ListDirectory
        $request.Credentials = New-Object System.Net.NetworkCredential($username,$password)
        $response = [System.Net.FtpWebResponse]$request.GetResponse()
        [System.IO.Stream]$stream = $response.GetResponseStream()
        $reader = new-object System.IO.StreamReader($stream)
        $list = $reader.ReadToEnd() -split "`n"  
        $stream.Close();$response.Close();$reader.Close()
        $stream.Dispose();$response.Dispose();$reader.Dispose()
        return $list
}

function List-AllFTPFiles([string]$server,$username,$password){
    function Get-FilesInDir([string]$path){
        $filelist = @()
        $request = [System.Net.FtpWebRequest]::Create("$server/$path")  
        $request.UseBinary = $false
        $request.Method = [System.Net.WebRequestMethods+FTP]::ListDirectoryDetails
        $request.Credentials = New-Object System.Net.NetworkCredential($username,$password)
        $response = [System.Net.FtpWebResponse]$request.GetResponse()
        [System.IO.Stream]$stream = $response.GetResponseStream()
        $reader = new-object System.IO.StreamReader($stream)
        $folderlist = $reader.ReadToEnd() -split [Environment]::NewLine | select -skip 2 | ?{$_ -ne ''}  
        $stream.Close();$response.Close();$reader.Close()
        
        # Items durchlaufen
        $folderlist | %{
            $tokens = $_ -split '\s+'  
            $item = $tokens[8..($tokens.length-1)]
            if ($_ -match '^d'){  
                Get-FilesInDir "$path/$item"  
            }else{
                $filelist += "$path/$item"  
            }
        }
        $stream.Dispose();$response.Dispose();$reader.Dispose()
        return $filelist
    }
    return Get-FilesInDir
}

function Delete-FtpFile([string]$url,$username,$password){
    try{
        $request = [System.Net.FtpWebRequest]::Create($url)
        $request.Method = [System.Net.WebRequestMethods+FTP]::DeleteFile
        $request.Credentials = New-Object System.Net.NetworkCredential($username,$password)
        $response = [System.Net.FtpWebResponse]$request.GetResponse()
        $result = $response.StatusDescription
        $response.Close()
        return $result
    }catch{
        throw $_.Exception.Message
        return $false
    }
}

$username = 'FTPUSER'  
$password =  'PASSWORD'  
$remotefile = 'ftp://ftp.domain.de/file.csv'  
$localfile = 'C:\Ordner\file.csv'  

# Beispiele:
# -----------
# Download-File -url $remotefile -path $localfile -username $username -password $password
# Upload-File -path $localfile -url $remotefile -username $username -password $password
# List-FTPFiles -url 'ftp://ftp.domain.de/ordner/*.log' -username $username -password $password 
# List-AllFTPFiles -server 'ftp://ftp.domain.de' -username $username -password $password 
# Delete-FtpFile -url $remotefile -username $username -password $password